well...yeah....I guess we don't know everything yet. I DO hold a generalized opinion, though, that some things ARE in fact, impossible. I suspect that it is NOT possible to make 'compounds' with Gold...(and no AuH₂O joles, please.) I really doubt that one can sharpen an axe on a feshly peeled banana.....and I will withhold opinion on FTL drives.

(oh...and to repeat: I DO believe, as in 'willing to bet', that there are other sentient being somewhere in the Universe....just not that they can get to US)